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ASUS ROG Maximus VIII Impact Mini-ITX (Intel Z170) Motherboard Review

By: Steven Bassiri | Socket LGA 1150/1151 in Motherboards | Posted: Nov 17, 2015 6:50 pm
TweakTown Rating: 93%Manufacturer: ASUS

Circuit Analysis

 

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Maximus VIII Impact in its birthday suit.

 

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The main CPU VRM is on the same PCB as the memory VRM. The VCCSA and VCCIO are on the main board and not on the daughterboard. The CPU VRM is a true 8-phase VRM, and the DRAM is a 2-phase VRM. ASUS is using the same micro-fine allow inductors that are designed to maintain a more stable magnetic field due to smaller and more uniform granule size. The PWMs that control the CPU and DRAM VRMs are located on the back of the board.

 

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ASUS is using their re-branded IR35201, labeled ASP14051, for the 8-phase CPU VRM. I am unsure as to what the DRAM PWM is, but I know it is a two-phase PWM and might have integrated drivers. ASUS is using IR3553 40A integrated power stages for the main CPU VRM, and these are top-notch parts with integrated MOSFETs and drivers. The memory VRM uses two CSD87588N NexFETs from TI, which can provide 25A each.

 

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For the VCCIO and VCCSA ASUS uses a single phase VRM controlled by an APW8723A and two PowerPAK MOSFETs, and a Texas Instruments TPS51362 10A converter.

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